Patents by Inventor Harold E. Walker, Jr.

Harold E. Walker, Jr. has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Top opening door assembly
    Patent number: 4542931
    Abstract: Top closing doors are pivotally mounted on a trailer and are provided with a driving mechanism including a drive cylinder connected by a pin to an endless chain extended in figure-eight fashion around opposed sprockets at the ends of the trailer. The doors are driven by swinging arms connected to the sprockets so as to move in opposite directions during opening and closing and provide full 270.degree. opening movement. The chain includes a master drive link to provide driving stability and an adjustable link passing in guiding relationship to the master link and for providing the required driving tension. The master link is driven by a drive pin connected to a hydraulic cylinder.
    Type: Grant
    Filed: September 9, 1983
    Date of Patent: September 24, 1985
    Assignee: Somerset Welding & Steel, Inc.
    Inventor: Harold E. Walker, Jr.